| /* -*- mode: C; c-basic-offset: 3; -*- */ |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- File- and socket-related libc stuff. m_libcfile.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2015 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #include "pub_core_basics.h" |
| #include "pub_core_vki.h" |
| #include "pub_core_vkiscnums.h" |
| #include "pub_core_debuglog.h" |
| #include "pub_core_libcbase.h" |
| #include "pub_core_libcassert.h" |
| #include "pub_core_libcfile.h" |
| #include "pub_core_libcprint.h" // VG_(sprintf) |
| #include "pub_core_libcproc.h" // VG_(getpid), VG_(getppid) |
| #include "pub_core_clientstate.h" // VG_(fd_hard_limit) |
| #include "pub_core_mallocfree.h" // VG_(realloc) |
| #include "pub_core_syscall.h" |
| |
| /* IMPORTANT: on Darwin it is essential to use the _nocancel versions |
| of syscalls rather than the vanilla version, if a _nocancel version |
| is available. See docs/internals/Darwin-notes.txt for the reason |
| why. */ |
| |
| /* --------------------------------------------------------------------- |
| File stuff |
| ------------------------------------------------------------------ */ |
| |
| /* Move an fd into the Valgrind-safe range */ |
| Int VG_(safe_fd)(Int oldfd) |
| { |
| Int newfd; |
| |
| vg_assert(VG_(fd_hard_limit) != -1); |
| |
| newfd = VG_(fcntl)(oldfd, VKI_F_DUPFD, VG_(fd_hard_limit)); |
| if (newfd != -1) |
| VG_(close)(oldfd); |
| |
| /* Set the close-on-exec flag for this fd. */ |
| VG_(fcntl)(newfd, VKI_F_SETFD, VKI_FD_CLOEXEC); |
| |
| vg_assert(newfd >= VG_(fd_hard_limit)); |
| return newfd; |
| } |
| |
| /* Given a file descriptor, attempt to deduce its filename. To do |
| this, we use /proc/self/fd/<FD>. If this doesn't point to a file, |
| or if it doesn't exist, we return False. |
| Upon successful completion *result contains the filename. The |
| filename will be overwritten with the next invocation so callers |
| need to copy the filename if needed. *result is NULL if the filename |
| cannot be deduced. */ |
| Bool VG_(resolve_filename) ( Int fd, const HChar** result ) |
| { |
| # if defined(VGO_linux) || defined(VGO_solaris) |
| static HChar *buf = NULL; |
| static SizeT bufsiz = 0; |
| |
| if (buf == NULL) { // first time |
| bufsiz = 500; |
| buf = VG_(malloc)("resolve_filename", bufsiz); |
| } |
| |
| HChar tmp[64]; // large enough |
| { |
| # if defined(VGO_linux) |
| VG_(sprintf)(tmp, "/proc/self/fd/%d", fd); |
| # elif defined(VGO_solaris) |
| VG_(sprintf)(tmp, "/proc/self/path/%d", fd); |
| # endif |
| } |
| |
| while (42) { |
| SSizeT res = VG_(readlink)(tmp, buf, bufsiz); |
| if (res < 0) break; |
| if (res == bufsiz) { // buffer too small; increase and retry |
| bufsiz += 500; |
| buf = VG_(realloc)("resolve_filename", buf, bufsiz); |
| continue; |
| } |
| vg_assert(bufsiz > res); // paranoia |
| if (buf[0] != '/') break; |
| |
| buf[res] = '\0'; |
| *result = buf; |
| return True; |
| } |
| // Failure |
| *result = NULL; |
| return False; |
| |
| # elif defined(VGO_darwin) |
| HChar tmp[VKI_MAXPATHLEN+1]; |
| if (0 == VG_(fcntl)(fd, VKI_F_GETPATH, (UWord)tmp)) { |
| static HChar *buf = NULL; |
| |
| if (buf == NULL) |
| buf = VG_(malloc)("resolve_filename", VKI_MAXPATHLEN+1); |
| VG_(strcpy)( buf, tmp ); |
| |
| *result = buf; |
| if (buf[0] == '/') return True; |
| } |
| // Failure |
| *result = NULL; |
| return False; |
| |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| SysRes VG_(mknod) ( const HChar* pathname, Int mode, UWord dev ) |
| { |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| /* ARM64 wants to use __NR_mknodat rather than __NR_mknod. */ |
| SysRes res = VG_(do_syscall4)(__NR_mknodat, |
| VKI_AT_FDCWD, (UWord)pathname, mode, dev); |
| # elif defined(VGO_linux) || defined(VGO_darwin) |
| SysRes res = VG_(do_syscall3)(__NR_mknod, |
| (UWord)pathname, mode, dev); |
| # elif defined(VGO_solaris) |
| SysRes res = VG_(do_syscall4)(__NR_mknodat, |
| VKI_AT_FDCWD, (UWord)pathname, mode, dev); |
| # else |
| # error Unknown OS |
| # endif |
| return res; |
| } |
| |
| SysRes VG_(open) ( const HChar* pathname, Int flags, Int mode ) |
| { |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| /* ARM64 wants to use __NR_openat rather than __NR_open. */ |
| SysRes res = VG_(do_syscall4)(__NR_openat, |
| VKI_AT_FDCWD, (UWord)pathname, flags, mode); |
| # elif defined(VGO_linux) |
| SysRes res = VG_(do_syscall3)(__NR_open, |
| (UWord)pathname, flags, mode); |
| # elif defined(VGO_darwin) |
| SysRes res = VG_(do_syscall3)(__NR_open_nocancel, |
| (UWord)pathname, flags, mode); |
| # elif defined(VGO_solaris) |
| SysRes res = VG_(do_syscall4)(__NR_openat, |
| VKI_AT_FDCWD, (UWord)pathname, flags, mode); |
| # else |
| # error Unknown OS |
| # endif |
| return res; |
| } |
| |
| Int VG_(fd_open) (const HChar* pathname, Int flags, Int mode) |
| { |
| SysRes sr; |
| sr = VG_(open) (pathname, flags, mode); |
| if (sr_isError (sr)) |
| return -1; |
| else |
| return sr_Res (sr); |
| } |
| |
| void VG_(close) ( Int fd ) |
| { |
| /* Hmm. Return value is not checked. That's uncool. */ |
| # if defined(VGO_linux) || defined(VGO_solaris) |
| (void)VG_(do_syscall1)(__NR_close, fd); |
| # elif defined(VGO_darwin) |
| (void)VG_(do_syscall1)(__NR_close_nocancel, fd); |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| Int VG_(read) ( Int fd, void* buf, Int count) |
| { |
| Int ret; |
| # if defined(VGO_linux) || defined(VGO_solaris) |
| SysRes res = VG_(do_syscall3)(__NR_read, fd, (UWord)buf, count); |
| # elif defined(VGO_darwin) |
| SysRes res = VG_(do_syscall3)(__NR_read_nocancel, fd, (UWord)buf, count); |
| # else |
| # error Unknown OS |
| # endif |
| if (sr_isError(res)) { |
| ret = - (Int)(Word)sr_Err(res); |
| vg_assert(ret < 0); |
| } else { |
| ret = (Int)(Word)sr_Res(res); |
| vg_assert(ret >= 0); |
| } |
| return ret; |
| } |
| |
| Int VG_(write) ( Int fd, const void* buf, Int count) |
| { |
| Int ret; |
| # if defined(VGO_linux) || defined(VGO_solaris) |
| SysRes res = VG_(do_syscall3)(__NR_write, fd, (UWord)buf, count); |
| # elif defined(VGO_darwin) |
| SysRes res = VG_(do_syscall3)(__NR_write_nocancel, fd, (UWord)buf, count); |
| # else |
| # error "Unknown OS" |
| # endif |
| if (sr_isError(res)) { |
| ret = - (Int)(Word)sr_Err(res); |
| vg_assert(ret < 0); |
| } else { |
| ret = (Int)(Word)sr_Res(res); |
| vg_assert(ret >= 0); |
| } |
| return ret; |
| } |
| |
| |
| Int VG_(pipe) ( Int fd[2] ) |
| { |
| # if defined(VGP_mips32_linux) || defined(VGP_mips64_linux) |
| /* __NR_pipe has a strange return convention on mips32-linux. */ |
| SysRes res = VG_(do_syscall1)(__NR_pipe, (UWord)fd); |
| if (!sr_isError(res)) { |
| fd[0] = (Int)sr_Res(res); |
| fd[1] = (Int)sr_ResEx(res); |
| return 0; |
| } else { |
| return -1; |
| } |
| # elif defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res = VG_(do_syscall2)(__NR_pipe2, (UWord)fd, 0); |
| return sr_isError(res) ? -1 : 0; |
| # elif defined(VGO_linux) |
| SysRes res = VG_(do_syscall1)(__NR_pipe, (UWord)fd); |
| return sr_isError(res) ? -1 : 0; |
| # elif defined(VGO_darwin) |
| /* __NR_pipe is UX64, so produces a double-word result */ |
| SysRes res = VG_(do_syscall0)(__NR_pipe); |
| if (!sr_isError(res)) { |
| fd[0] = (Int)sr_Res(res); |
| fd[1] = (Int)sr_ResHI(res); |
| } |
| return sr_isError(res) ? -1 : 0; |
| # elif defined(VGO_solaris) |
| # if defined(SOLARIS_NEW_PIPE_SYSCALL) |
| SysRes res = VG_(do_syscall2)(__NR_pipe, (UWord)fd, 0); |
| return sr_isError(res) ? -1 : 0; |
| # else |
| SysRes res = VG_(do_syscall0)(__NR_pipe); |
| if (!sr_isError(res)) { |
| fd[0] = (Int)sr_Res(res); |
| fd[1] = (Int)sr_ResHI(res); |
| } |
| return sr_isError(res) ? -1 : 0; |
| # endif |
| # else |
| # error "Unknown OS" |
| # endif |
| } |
| |
| Off64T VG_(lseek) ( Int fd, Off64T offset, Int whence ) |
| { |
| # if defined(VGO_linux) || defined(VGP_amd64_darwin) |
| # if defined(__NR__llseek) |
| Off64T result; |
| SysRes res = VG_(do_syscall5)(__NR__llseek, fd, |
| offset >> 32, offset & 0xffffffff, |
| (UWord)&result, whence); |
| return sr_isError(res) ? (-1) : result; |
| # else |
| SysRes res = VG_(do_syscall3)(__NR_lseek, fd, offset, whence); |
| vg_assert(sizeof(Off64T) == sizeof(Word)); |
| return sr_isError(res) ? (-1) : sr_Res(res); |
| # endif |
| # elif defined(VGP_x86_darwin) |
| SysRes res = VG_(do_syscall4)(__NR_lseek, fd, |
| offset & 0xffffffff, offset >> 32, whence); |
| return sr_isError(res) ? (-1) : sr_Res(res); |
| # elif defined(VGP_x86_solaris) |
| SysRes res = VG_(do_syscall4)(__NR_llseek, fd, |
| offset & 0xffffffff, offset >> 32, whence); |
| return sr_isError(res) ? (-1) : ((ULong)sr_ResHI(res) << 32 | sr_Res(res)); |
| # elif defined(VGP_amd64_solaris) |
| SysRes res = VG_(do_syscall3)(__NR_lseek, fd, offset, whence); |
| vg_assert(sizeof(Off64T) == sizeof(Word)); |
| return sr_isError(res) ? (-1) : sr_Res(res); |
| # else |
| # error "Unknown plat" |
| # endif |
| /* if you change the error-reporting conventions of this, also |
| change all usage points. */ |
| } |
| |
| |
| /* stat/fstat support. It's uggerly. We have impedance-match into a |
| 'struct vg_stat' in order to have a single structure that callers |
| can use consistently on all platforms. */ |
| |
| #define TRANSLATE_TO_vg_stat(_p_vgstat, _p_vkistat) \ |
| do { \ |
| (_p_vgstat)->dev = (ULong)( (_p_vkistat)->st_dev ); \ |
| (_p_vgstat)->ino = (ULong)( (_p_vkistat)->st_ino ); \ |
| (_p_vgstat)->nlink = (ULong)( (_p_vkistat)->st_nlink ); \ |
| (_p_vgstat)->mode = (UInt) ( (_p_vkistat)->st_mode ); \ |
| (_p_vgstat)->uid = (UInt) ( (_p_vkistat)->st_uid ); \ |
| (_p_vgstat)->gid = (UInt) ( (_p_vkistat)->st_gid ); \ |
| (_p_vgstat)->rdev = (ULong)( (_p_vkistat)->st_rdev ); \ |
| (_p_vgstat)->size = (Long) ( (_p_vkistat)->st_size ); \ |
| (_p_vgstat)->blksize = (ULong)( (_p_vkistat)->st_blksize ); \ |
| (_p_vgstat)->blocks = (ULong)( (_p_vkistat)->st_blocks ); \ |
| (_p_vgstat)->atime = (ULong)( (_p_vkistat)->st_atime ); \ |
| (_p_vgstat)->atime_nsec = (ULong)( (_p_vkistat)->st_atime_nsec ); \ |
| (_p_vgstat)->mtime = (ULong)( (_p_vkistat)->st_mtime ); \ |
| (_p_vgstat)->mtime_nsec = (ULong)( (_p_vkistat)->st_mtime_nsec ); \ |
| (_p_vgstat)->ctime = (ULong)( (_p_vkistat)->st_ctime ); \ |
| (_p_vgstat)->ctime_nsec = (ULong)( (_p_vkistat)->st_ctime_nsec ); \ |
| } while (0) |
| |
| SysRes VG_(stat) ( const HChar* file_name, struct vg_stat* vgbuf ) |
| { |
| SysRes res; |
| VG_(memset)(vgbuf, 0, sizeof(*vgbuf)); |
| |
| # if defined(VGO_linux) || defined(VGO_darwin) |
| /* First try with stat64. If that doesn't work out, fall back to |
| the vanilla version. */ |
| # if defined(__NR_stat64) |
| { struct vki_stat64 buf64; |
| res = VG_(do_syscall2)(__NR_stat64, (UWord)file_name, (UWord)&buf64); |
| if (!(sr_isError(res) && sr_Err(res) == VKI_ENOSYS)) { |
| /* Success, or any failure except ENOSYS */ |
| if (!sr_isError(res)) |
| TRANSLATE_TO_vg_stat(vgbuf, &buf64); |
| return res; |
| } |
| } |
| # endif /* defined(__NR_stat64) */ |
| /* This is the fallback ("vanilla version"). */ |
| { struct vki_stat buf; |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| res = VG_(do_syscall3)(__NR3264_fstatat, VKI_AT_FDCWD, |
| (UWord)file_name, (UWord)&buf); |
| # else |
| res = VG_(do_syscall2)(__NR_stat, (UWord)file_name, (UWord)&buf); |
| # endif |
| if (!sr_isError(res)) |
| TRANSLATE_TO_vg_stat(vgbuf, &buf); |
| return res; |
| } |
| # elif defined(VGO_solaris) |
| { |
| # if defined(VGP_x86_solaris) |
| struct vki_stat64 buf64; |
| res = VG_(do_syscall4)(__NR_fstatat64, VKI_AT_FDCWD, (UWord)file_name, |
| (UWord)&buf64, 0); |
| # elif defined(VGP_amd64_solaris) |
| struct vki_stat buf64; |
| res = VG_(do_syscall4)(__NR_fstatat, VKI_AT_FDCWD, (UWord)file_name, |
| (UWord)&buf64, 0); |
| # else |
| # error "Unknown platform" |
| # endif |
| if (!sr_isError(res)) |
| TRANSLATE_TO_vg_stat(vgbuf, &buf64); |
| return res; |
| } |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| Int VG_(fstat) ( Int fd, struct vg_stat* vgbuf ) |
| { |
| SysRes res; |
| VG_(memset)(vgbuf, 0, sizeof(*vgbuf)); |
| |
| # if defined(VGO_linux) || defined(VGO_darwin) |
| /* First try with fstat64. If that doesn't work out, fall back to |
| the vanilla version. */ |
| # if defined(__NR_fstat64) |
| { struct vki_stat64 buf64; |
| res = VG_(do_syscall2)(__NR_fstat64, (UWord)fd, (UWord)&buf64); |
| if (!(sr_isError(res) && sr_Err(res) == VKI_ENOSYS)) { |
| /* Success, or any failure except ENOSYS */ |
| if (!sr_isError(res)) |
| TRANSLATE_TO_vg_stat(vgbuf, &buf64); |
| return sr_isError(res) ? (-1) : 0; |
| } |
| } |
| # endif /* if defined(__NR_fstat64) */ |
| { struct vki_stat buf; |
| res = VG_(do_syscall2)(__NR_fstat, (UWord)fd, (UWord)&buf); |
| if (!sr_isError(res)) |
| TRANSLATE_TO_vg_stat(vgbuf, &buf); |
| return sr_isError(res) ? (-1) : 0; |
| } |
| # elif defined(VGO_solaris) |
| { |
| # if defined(VGP_x86_solaris) |
| struct vki_stat64 buf64; |
| res = VG_(do_syscall4)(__NR_fstatat64, (UWord)fd, 0, (UWord)&buf64, 0); |
| # elif defined(VGP_amd64_solaris) |
| struct vki_stat buf64; |
| res = VG_(do_syscall4)(__NR_fstatat, (UWord)fd, 0, (UWord)&buf64, 0); |
| # else |
| # error "Unknown platform" |
| # endif |
| if (!sr_isError(res)) |
| TRANSLATE_TO_vg_stat(vgbuf, &buf64); |
| return sr_isError(res) ? (-1) : 0; |
| } |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| #undef TRANSLATE_TO_vg_stat |
| |
| |
| Long VG_(fsize) ( Int fd ) |
| { |
| struct vg_stat buf; |
| Int res = VG_(fstat)( fd, &buf ); |
| return (res == -1) ? (-1LL) : buf.size; |
| } |
| |
| SysRes VG_(getxattr) ( const HChar* file_name, const HChar* attr_name, Addr attr_value, SizeT attr_value_len ) |
| { |
| SysRes res; |
| #if defined(VGO_linux) |
| res = VG_(do_syscall4)(__NR_getxattr, (UWord)file_name, (UWord)attr_name, |
| attr_value, attr_value_len); |
| #else |
| res = VG_(mk_SysRes_Error)(VKI_ENOSYS); |
| #endif |
| return res; |
| } |
| |
| Bool VG_(is_dir) ( const HChar* f ) |
| { |
| struct vg_stat buf; |
| SysRes res = VG_(stat)(f, &buf); |
| return sr_isError(res) ? False |
| : VKI_S_ISDIR(buf.mode) ? True : False; |
| } |
| |
| SysRes VG_(dup) ( Int oldfd ) |
| { |
| # if defined(VGO_linux) || defined(VGO_darwin) |
| return VG_(do_syscall1)(__NR_dup, oldfd); |
| # elif defined(VGO_solaris) |
| return VG_(do_syscall3)(__NR_fcntl, oldfd, F_DUPFD, 0); |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| SysRes VG_(dup2) ( Int oldfd, Int newfd ) |
| { |
| # if defined(VGO_linux) || defined(VGO_darwin) |
| return VG_(do_syscall2)(__NR_dup2, oldfd, newfd); |
| # elif defined(VGO_solaris) |
| return VG_(do_syscall3)(__NR_fcntl, oldfd, F_DUP2FD, newfd); |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| /* Returns -1 on error. */ |
| Int VG_(fcntl) ( Int fd, Int cmd, Addr arg ) |
| { |
| # if defined(VGO_linux) || defined(VGO_solaris) |
| SysRes res = VG_(do_syscall3)(__NR_fcntl, fd, cmd, arg); |
| # elif defined(VGO_darwin) |
| SysRes res = VG_(do_syscall3)(__NR_fcntl_nocancel, fd, cmd, arg); |
| # else |
| # error "Unknown OS" |
| # endif |
| return sr_isError(res) ? -1 : sr_Res(res); |
| } |
| |
| Int VG_(rename) ( const HChar* old_name, const HChar* new_name ) |
| { |
| # if defined(VGP_tilegx_linux) |
| SysRes res = VG_(do_syscall3)(__NR_renameat, VKI_AT_FDCWD, |
| (UWord)old_name, (UWord)new_name); |
| # elif defined(VGO_linux) || defined(VGO_darwin) |
| SysRes res = VG_(do_syscall2)(__NR_rename, (UWord)old_name, (UWord)new_name); |
| # elif defined(VGO_solaris) |
| SysRes res = VG_(do_syscall4)(__NR_renameat, VKI_AT_FDCWD, (UWord)old_name, |
| VKI_AT_FDCWD, (UWord)new_name); |
| # else |
| # error "Unknown OS" |
| # endif |
| return sr_isError(res) ? (-1) : 0; |
| } |
| |
| Int VG_(unlink) ( const HChar* file_name ) |
| { |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res = VG_(do_syscall2)(__NR_unlinkat, VKI_AT_FDCWD, |
| (UWord)file_name); |
| # elif defined(VGO_linux) || defined(VGO_darwin) |
| SysRes res = VG_(do_syscall1)(__NR_unlink, (UWord)file_name); |
| # elif defined(VGO_solaris) |
| SysRes res = VG_(do_syscall3)(__NR_unlinkat, VKI_AT_FDCWD, |
| (UWord)file_name, 0); |
| # else |
| # error "Unknown OS" |
| # endif |
| return sr_isError(res) ? (-1) : 0; |
| } |
| |
| /* The working directory at startup. |
| All that is really needed is to note the cwd at process startup. |
| Hence VG_(record_startup_wd) notes it (in a platform dependent way) |
| and VG_(get_startup_wd) produces the noted value. */ |
| static HChar *startup_wd; |
| static Bool startup_wd_acquired = False; |
| |
| /* Record the process' working directory at startup. Is intended to |
| be called exactly once, at startup, before the working directory |
| changes. Return True for success, False for failure, so that the |
| caller can bomb out suitably without creating module cycles if |
| there is a problem. */ |
| Bool VG_(record_startup_wd) ( void ) |
| { |
| vg_assert(!startup_wd_acquired); |
| # if defined(VGO_linux) || defined(VGO_solaris) |
| /* Simple: just ask the kernel */ |
| SysRes res; |
| SizeT szB = 0; |
| do { |
| szB += 500; |
| startup_wd = VG_(realloc)("startup_wd", startup_wd, szB); |
| VG_(memset)(startup_wd, 0, szB); |
| res = VG_(do_syscall2)(__NR_getcwd, (UWord)startup_wd, szB-1); |
| } while (sr_isError(res)); |
| |
| vg_assert(startup_wd[szB-1] == 0); |
| startup_wd_acquired = True; |
| return True; |
| |
| # elif defined(VGO_darwin) |
| /* We can't ask the kernel, so instead rely on launcher-*.c to |
| tell us the startup path. Note the env var is keyed to the |
| parent's PID, not ours, since our parent is the launcher |
| process. */ |
| { HChar envvar[100]; // large enough |
| HChar* wd; |
| VG_(memset)(envvar, 0, sizeof(envvar)); |
| VG_(sprintf)(envvar, "VALGRIND_STARTUP_PWD_%d_XYZZY", |
| (Int)VG_(getppid)()); |
| wd = VG_(getenv)( envvar ); |
| if (wd == NULL) |
| return False; |
| SizeT need = VG_(strlen)(wd) + 1; |
| startup_wd = VG_(malloc)("startup_wd", need); |
| VG_(strcpy)(startup_wd, wd); |
| startup_wd_acquired = True; |
| return True; |
| } |
| # else |
| # error Unknown OS |
| # endif |
| } |
| |
| /* Return the previously acquired startup_wd. */ |
| const HChar *VG_(get_startup_wd) ( void ) |
| { |
| vg_assert(startup_wd_acquired); |
| |
| return startup_wd; |
| } |
| |
| SysRes VG_(poll) (struct vki_pollfd *fds, Int nfds, Int timeout) |
| { |
| SysRes res; |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| /* ARM64 wants to use __NR_ppoll rather than __NR_poll. */ |
| struct vki_timespec timeout_ts; |
| if (timeout >= 0) { |
| timeout_ts.tv_sec = timeout / 1000; |
| timeout_ts.tv_nsec = ((long)timeout % 1000) * 1000000; |
| } |
| res = VG_(do_syscall4)(__NR_ppoll, |
| (UWord)fds, nfds, |
| (UWord)(timeout >= 0 ? &timeout_ts : NULL), |
| (UWord)NULL); |
| # elif defined(VGO_linux) |
| res = VG_(do_syscall3)(__NR_poll, (UWord)fds, nfds, timeout); |
| # elif defined(VGO_darwin) |
| res = VG_(do_syscall3)(__NR_poll_nocancel, (UWord)fds, nfds, timeout); |
| # elif defined(VGO_solaris) |
| struct vki_timespec ts; |
| struct vki_timespec *tsp; |
| |
| if (timeout < 0) |
| tsp = NULL; |
| else { |
| ts.tv_sec = timeout / 1000; |
| ts.tv_nsec = (timeout % 1000) * 1000000; |
| tsp = &ts; |
| } |
| |
| res = VG_(do_syscall4)(__NR_pollsys, (UWord)fds, nfds, (UWord)tsp, 0); |
| # else |
| # error "Unknown OS" |
| # endif |
| return res; |
| } |
| |
| |
| /* Performs the readlink operation and puts the result into 'buf'. |
| Note, that the string in 'buf' is *not* null-terminated. The function |
| returns the number of characters put into 'buf' or -1 if an error |
| occurred. */ |
| SSizeT VG_(readlink) (const HChar* path, HChar* buf, SizeT bufsiz) |
| { |
| SysRes res; |
| /* res = readlink( path, buf, bufsiz ); */ |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| res = VG_(do_syscall4)(__NR_readlinkat, VKI_AT_FDCWD, |
| (UWord)path, (UWord)buf, bufsiz); |
| # elif defined(VGO_linux) || defined(VGO_darwin) |
| res = VG_(do_syscall3)(__NR_readlink, (UWord)path, (UWord)buf, bufsiz); |
| # elif defined(VGO_solaris) |
| res = VG_(do_syscall4)(__NR_readlinkat, VKI_AT_FDCWD, (UWord)path, |
| (UWord)buf, bufsiz); |
| # else |
| # error "Unknown OS" |
| # endif |
| return sr_isError(res) ? -1 : sr_Res(res); |
| } |
| |
| #if defined(VGO_linux) || defined(VGO_solaris) |
| Int VG_(getdents64) (Int fd, struct vki_dirent64 *dirp, UInt count) |
| { |
| SysRes res; |
| /* res = getdents( fd, dirp, count ); */ |
| # if defined(VGP_amd64_solaris) |
| /* This silently assumes that dirent64 and dirent on amd64 are same, which |
| they should always be. */ |
| res = VG_(do_syscall3)(__NR_getdents, fd, (UWord)dirp, count); |
| # else |
| res = VG_(do_syscall3)(__NR_getdents64, fd, (UWord)dirp, count); |
| # endif |
| return sr_isError(res) ? -1 : sr_Res(res); |
| } |
| #endif |
| |
| /* Check accessibility of a file. Returns zero for access granted, |
| nonzero otherwise. */ |
| Int VG_(access) ( const HChar* path, Bool irusr, Bool iwusr, Bool ixusr ) |
| { |
| # if defined(VGO_linux) |
| /* Very annoyingly, I cannot find any definition for R_OK et al in |
| the kernel interfaces. Therefore I reluctantly resort to |
| hardwiring in these magic numbers that I determined by |
| experimentation. */ |
| # define VKI_R_OK 4 |
| # define VKI_W_OK 2 |
| # define VKI_X_OK 1 |
| # endif |
| |
| UWord w = (irusr ? VKI_R_OK : 0) |
| | (iwusr ? VKI_W_OK : 0) |
| | (ixusr ? VKI_X_OK : 0); |
| # if defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res = VG_(do_syscall3)(__NR_faccessat, VKI_AT_FDCWD, (UWord)path, w); |
| # elif defined(VGO_linux) || defined(VGO_darwin) |
| SysRes res = VG_(do_syscall2)(__NR_access, (UWord)path, w); |
| # elif defined(VGO_solaris) |
| SysRes res = VG_(do_syscall4)(__NR_faccessat, VKI_AT_FDCWD, (UWord)path, |
| w, 0); |
| # else |
| # error "Unknown OS" |
| # endif |
| return sr_isError(res) ? 1 : 0; |
| |
| # if defined(VGO_linux) |
| # undef VKI_R_OK |
| # undef VKI_W_OK |
| # undef VKI_X_OK |
| # endif |
| } |
| |
| /* |
| Emulate the normal Unix permissions checking algorithm. |
| |
| If owner matches, then use the owner permissions, else |
| if group matches, then use the group permissions, else |
| use other permissions. |
| |
| Note that we can't deal properly with SUID/SGID. By default |
| (allow_setuid == False), we refuse to run them (otherwise the |
| executable may misbehave if it doesn't have the permissions it |
| thinks it does). However, the caller may indicate that setuid |
| executables are allowed, for example if we are going to exec them |
| but not trace into them (iow, client sys_execve when |
| clo_trace_children == False). |
| |
| If VKI_EACCES is returned (iow, permission was refused), then |
| *is_setuid is set to True iff permission was refused because the |
| executable is setuid. |
| */ |
| /* returns: 0 = success, non-0 is failure */ |
| Int VG_(check_executable)(/*OUT*/Bool* is_setuid, |
| const HChar* f, Bool allow_setuid) |
| { |
| struct vg_stat st; |
| SysRes res = VG_(stat)(f, &st); |
| |
| if (is_setuid) |
| *is_setuid = False; |
| |
| if (sr_isError(res)) { |
| return sr_Err(res); |
| } |
| |
| if ( VKI_S_ISDIR (st.mode) ) { |
| return VKI_EACCES; |
| } |
| |
| if ( (st.mode & (VKI_S_ISUID | VKI_S_ISGID)) && !allow_setuid ) { |
| if (is_setuid) |
| *is_setuid = True; |
| return VKI_EACCES; |
| } |
| |
| res = VG_(getxattr)(f, "security.capability", (Addr)0, 0); |
| if (!sr_isError(res) && !allow_setuid) { |
| if (is_setuid) |
| *is_setuid = True; |
| return VKI_EACCES; |
| } |
| |
| if (VG_(geteuid)() == st.uid) { |
| if (!(st.mode & VKI_S_IXUSR)) |
| return VKI_EACCES; |
| } else { |
| Int grpmatch = 0; |
| |
| if (VG_(getegid)() == st.gid) |
| grpmatch = 1; |
| else { |
| UInt *groups = NULL; |
| Int ngrp; |
| |
| /* Find out # groups, allocate large enough array and fetch groups */ |
| ngrp = VG_(getgroups)(0, NULL); |
| if (ngrp != -1) { |
| groups = VG_(malloc)("check_executable", ngrp * sizeof *groups); |
| ngrp = VG_(getgroups)(ngrp, groups); |
| } |
| |
| Int i; |
| /* ngrp will be -1 if VG_(getgroups) failed. */ |
| for (i = 0; i < ngrp; i++) { |
| if (groups[i] == st.gid) { |
| grpmatch = 1; |
| break; |
| } |
| } |
| VG_(free)(groups); |
| } |
| |
| if (grpmatch) { |
| if (!(st.mode & VKI_S_IXGRP)) { |
| return VKI_EACCES; |
| } |
| } else if (!(st.mode & VKI_S_IXOTH)) { |
| return VKI_EACCES; |
| } |
| } |
| |
| return 0; |
| } |
| |
| SysRes VG_(pread) ( Int fd, void* buf, Int count, OffT offset ) |
| { |
| SysRes res; |
| // on 32 bits platforms, we receive a 32 bits OffT but |
| // we must extend it to pass a long long 64 bits. |
| # if defined(VGP_x86_linux) |
| vg_assert(sizeof(OffT) == 4); |
| res = VG_(do_syscall5)(__NR_pread64, fd, (UWord)buf, count, |
| offset, 0); // Little endian long long |
| return res; |
| # elif defined(VGP_arm_linux) |
| vg_assert(sizeof(OffT) == 4); |
| res = VG_(do_syscall5)(__NR_pread64, fd, (UWord)buf, count, |
| 0, offset); // Big endian long long |
| return res; |
| # elif defined(VGP_ppc32_linux) |
| vg_assert(sizeof(OffT) == 4); |
| res = VG_(do_syscall6)(__NR_pread64, fd, (UWord)buf, count, |
| 0, // Padding needed on PPC32 |
| 0, offset); // Big endian long long |
| return res; |
| # elif defined(VGP_mips32_linux) && (VKI_LITTLE_ENDIAN) |
| vg_assert(sizeof(OffT) == 4); |
| res = VG_(do_syscall6)(__NR_pread64, fd, (UWord)buf, count, |
| 0, offset, 0); |
| return res; |
| # elif defined(VGP_mips32_linux) && (VKI_BIG_ENDIAN) |
| vg_assert(sizeof(OffT) == 4); |
| res = VG_(do_syscall6)(__NR_pread64, fd, (UWord)buf, count, |
| 0, 0, offset); |
| return res; |
| # elif defined(VGP_amd64_linux) || defined(VGP_s390x_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_mips64_linux) \ |
| || defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| res = VG_(do_syscall4)(__NR_pread64, fd, (UWord)buf, count, offset); |
| return res; |
| # elif defined(VGP_amd64_darwin) |
| vg_assert(sizeof(OffT) == 8); |
| res = VG_(do_syscall4)(__NR_pread_nocancel, fd, (UWord)buf, count, offset); |
| return res; |
| # elif defined(VGP_x86_darwin) |
| vg_assert(sizeof(OffT) == 8); |
| res = VG_(do_syscall5)(__NR_pread_nocancel, fd, (UWord)buf, count, |
| offset & 0xffffffff, offset >> 32); |
| return res; |
| # elif defined(VGP_x86_solaris) |
| vg_assert(sizeof(OffT) == 4); |
| res = VG_(do_syscall4)(__NR_pread, fd, (UWord)buf, count, offset); |
| return res; |
| # elif defined(VGP_amd64_solaris) |
| vg_assert(sizeof(OffT) == 8); |
| res = VG_(do_syscall4)(__NR_pread, fd, (UWord)buf, count, offset); |
| return res; |
| # else |
| # error "Unknown platform" |
| # endif |
| } |
| |
| /* Return the name of a directory for temporary files. */ |
| const HChar *VG_(tmpdir)(void) |
| { |
| const HChar *tmpdir; |
| |
| tmpdir = VG_(getenv)("TMPDIR"); |
| if (tmpdir == NULL || *tmpdir == '\0') tmpdir = VG_TMPDIR; |
| if (tmpdir == NULL || *tmpdir == '\0') tmpdir = "/tmp"; /* fallback */ |
| |
| return tmpdir; |
| } |
| |
| static const HChar mkstemp_format[] = "%s/valgrind_%s_%08x"; |
| |
| SizeT VG_(mkstemp_fullname_bufsz) ( SizeT part_of_name_len ) |
| { |
| return VG_(strlen)(mkstemp_format) |
| + VG_(strlen)(VG_(tmpdir)()) - 2 // %s tmpdir |
| + part_of_name_len - 2 // %s part_of_name |
| + 8 - 4 // %08x |
| + 1; // trailing 0 |
| } |
| |
| |
| Int VG_(mkstemp) ( const HChar* part_of_name, /*OUT*/HChar* fullname ) |
| { |
| Int n, tries; |
| UInt seed; |
| SysRes sres; |
| const HChar *tmpdir; |
| |
| vg_assert(part_of_name); |
| vg_assert(fullname); |
| n = VG_(strlen)(part_of_name); |
| vg_assert(n > 0 && n < 100); |
| |
| seed = (VG_(getpid)() << 9) ^ VG_(getppid)(); |
| |
| /* Determine sensible location for temporary files */ |
| tmpdir = VG_(tmpdir)(); |
| |
| tries = 0; |
| while (True) { |
| if (tries++ > 10) |
| return -1; |
| VG_(sprintf)( fullname, mkstemp_format, |
| tmpdir, part_of_name, VG_(random)( &seed )); |
| if (0) |
| VG_(printf)("VG_(mkstemp): trying: %s\n", fullname); |
| |
| sres = VG_(open)(fullname, |
| VKI_O_CREAT|VKI_O_RDWR|VKI_O_EXCL|VKI_O_TRUNC, |
| VKI_S_IRUSR|VKI_S_IWUSR); |
| if (sr_isError(sres)) { |
| VG_(umsg)("VG_(mkstemp): failed to create temp file: %s\n", fullname); |
| continue; |
| } |
| /* VG_(safe_fd) doesn't return if it fails. */ |
| return VG_(safe_fd)( sr_Res(sres) ); |
| } |
| /* NOTREACHED */ |
| } |
| |
| |
| /* --------------------------------------------------------------------- |
| Socket-related stuff. |
| ------------------------------------------------------------------ */ |
| |
| static |
| Int parse_inet_addr_and_port ( const HChar* str, UInt* ip_addr, UShort* port ); |
| |
| static |
| Int my_connect ( Int sockfd, struct vki_sockaddr_in* serv_addr, Int addrlen ); |
| |
| UInt VG_(htonl) ( UInt x ) |
| { |
| # if defined(VG_BIGENDIAN) |
| return x; |
| # else |
| return |
| (((x >> 24) & 0xFF) << 0) | (((x >> 16) & 0xFF) << 8) |
| | (((x >> 8) & 0xFF) << 16) | (((x >> 0) & 0xFF) << 24); |
| # endif |
| } |
| |
| UInt VG_(ntohl) ( UInt x ) |
| { |
| # if defined(VG_BIGENDIAN) |
| return x; |
| # else |
| return |
| (((x >> 24) & 0xFF) << 0) | (((x >> 16) & 0xFF) << 8) |
| | (((x >> 8) & 0xFF) << 16) | (((x >> 0) & 0xFF) << 24); |
| # endif |
| } |
| |
| UShort VG_(htons) ( UShort x ) |
| { |
| # if defined(VG_BIGENDIAN) |
| return x; |
| # else |
| return |
| (((x >> 8) & 0xFF) << 0) | (((x >> 0) & 0xFF) << 8); |
| # endif |
| } |
| |
| UShort VG_(ntohs) ( UShort x ) |
| { |
| # if defined(VG_BIGENDIAN) |
| return x; |
| # else |
| return |
| (((x >> 8) & 0xFF) << 0) | (((x >> 0) & 0xFF) << 8); |
| # endif |
| } |
| |
| |
| /* The main function. |
| |
| Supplied string contains either an ip address "192.168.0.1" or |
| an ip address and port pair, "192.168.0.1:1500". Parse these, |
| and return: |
| -1 if there is a parse error |
| -2 if no parse error, but specified host:port cannot be opened |
| the relevant file (socket) descriptor, otherwise. |
| is used. |
| */ |
| Int VG_(connect_via_socket)( const HChar* str ) |
| { |
| # if defined(VGO_linux) || defined(VGO_darwin) || defined(VGO_solaris) |
| Int sd, res; |
| struct vki_sockaddr_in servAddr; |
| UInt ip = 0; |
| UShort port = VG_CLO_DEFAULT_LOGPORT; |
| Bool ok = parse_inet_addr_and_port(str, &ip, &port); |
| if (!ok) |
| return -1; |
| |
| //if (0) |
| // VG_(printf)("ip = %d.%d.%d.%d, port %d\n", |
| // (ip >> 24) & 0xFF, (ip >> 16) & 0xFF, |
| // (ip >> 8) & 0xFF, ip & 0xFF, |
| // (UInt)port ); |
| |
| servAddr.sin_family = VKI_AF_INET; |
| servAddr.sin_addr.s_addr = VG_(htonl)(ip); |
| servAddr.sin_port = VG_(htons)(port); |
| |
| /* create socket */ |
| sd = VG_(socket)(VKI_AF_INET, VKI_SOCK_STREAM, 0 /* IPPROTO_IP ? */); |
| if (sd < 0) { |
| /* this shouldn't happen ... nevertheless */ |
| return -2; |
| } |
| |
| /* connect to server */ |
| res = my_connect(sd, &servAddr, sizeof(servAddr)); |
| if (res < 0) { |
| /* connection failed */ |
| return -2; |
| } |
| |
| return sd; |
| |
| # else |
| # error "Unknown OS" |
| # endif |
| } |
| |
| |
| /* Let d = one or more digits. Accept either: |
| d.d.d.d or d.d.d.d:d |
| */ |
| static Int parse_inet_addr_and_port ( const HChar* str, UInt* ip_addr, UShort* port ) |
| { |
| # define GET_CH ((*str) ? (*str++) : 0) |
| UInt ipa, i, j, c, any; |
| ipa = 0; |
| for (i = 0; i < 4; i++) { |
| j = 0; |
| any = 0; |
| while (1) { |
| c = GET_CH; |
| if (c < '0' || c > '9') break; |
| j = 10 * j + (int)(c - '0'); |
| any = 1; |
| } |
| if (any == 0 || j > 255) goto syntaxerr; |
| ipa = (ipa << 8) + j; |
| if (i <= 2 && c != '.') goto syntaxerr; |
| } |
| if (c == 0 || c == ':') |
| *ip_addr = ipa; |
| if (c == 0) goto ok; |
| if (c != ':') goto syntaxerr; |
| j = 0; |
| any = 0; |
| while (1) { |
| c = GET_CH; |
| if (c < '0' || c > '9') break; |
| j = j * 10 + (int)(c - '0'); |
| any = 1; |
| if (j > 65535) goto syntaxerr; |
| } |
| if (any == 0 || c != 0) goto syntaxerr; |
| if (j < 1024) goto syntaxerr; |
| *port = (UShort)j; |
| ok: |
| return 1; |
| syntaxerr: |
| return 0; |
| # undef GET_CH |
| } |
| |
| // GrP fixme safe_fd? |
| Int VG_(socket) ( Int domain, Int type, Int protocol ) |
| { |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) |
| SysRes res; |
| UWord args[3]; |
| args[0] = domain; |
| args[1] = type; |
| args[2] = protocol; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_SOCKET, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips32_linux) || defined(VGP_mips64_linux) \ |
| || defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall3)(__NR_socket, domain, type, protocol ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_darwin) |
| SysRes res; |
| res = VG_(do_syscall3)(__NR_socket, domain, type, protocol); |
| if (!sr_isError(res)) { |
| // Set SO_NOSIGPIPE so write() returns EPIPE instead of raising SIGPIPE |
| Int optval = 1; |
| SysRes res2; |
| res2 = VG_(do_syscall5)(__NR_setsockopt, sr_Res(res), VKI_SOL_SOCKET, |
| VKI_SO_NOSIGPIPE, (UWord)&optval, |
| sizeof(optval)); |
| // ignore setsockopt() error |
| } |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| /* XXX There doesn't seem to be an easy way to convince the send syscall to |
| only return EPIPE instead of raising SIGPIPE. EPIPE is only returned if |
| SM_KERNEL is set on the socket. Without serious hackery it looks we |
| can't set this flag. |
| |
| Should we wrap the send syscall below into sigprocmask calls to block |
| SIGPIPE? |
| */ |
| SysRes res; |
| res = VG_(do_syscall5)(__NR_so_socket, domain, type, protocol, |
| 0 /*devpath*/, VKI_SOV_DEFAULT /*version*/); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown arch" |
| # endif |
| } |
| |
| |
| static |
| Int my_connect ( Int sockfd, struct vki_sockaddr_in* serv_addr, Int addrlen ) |
| { |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) |
| SysRes res; |
| UWord args[3]; |
| args[0] = sockfd; |
| args[1] = (UWord)serv_addr; |
| args[2] = addrlen; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_CONNECT, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips32_linux) || defined(VGP_mips64_linux) \ |
| || defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall3)(__NR_connect, sockfd, (UWord)serv_addr, addrlen); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_darwin) |
| SysRes res; |
| res = VG_(do_syscall3)(__NR_connect_nocancel, |
| sockfd, (UWord)serv_addr, addrlen); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| SysRes res; |
| res = VG_(do_syscall4)(__NR_connect, sockfd, (UWord)serv_addr, addrlen, |
| VKI_SOV_DEFAULT /*version*/); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown arch" |
| # endif |
| } |
| |
| Int VG_(write_socket)( Int sd, const void *msg, Int count ) |
| { |
| /* This is actually send(). */ |
| |
| /* For Linux, VKI_MSG_NOSIGNAL is a request not to send SIGPIPE on |
| errors on stream oriented sockets when the other end breaks the |
| connection. The EPIPE error is still returned. |
| |
| For Darwin, VG_(socket)() sets SO_NOSIGPIPE to get EPIPE instead of |
| SIGPIPE */ |
| |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) |
| SysRes res; |
| UWord args[4]; |
| args[0] = sd; |
| args[1] = (UWord)msg; |
| args[2] = count; |
| args[3] = VKI_MSG_NOSIGNAL; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_SEND, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips32_linux) || defined(VGP_mips64_linux) \ |
| || defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall6)(__NR_sendto, sd, (UWord)msg, |
| count, VKI_MSG_NOSIGNAL, 0,0); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_x86_darwin) || defined(VGP_amd64_darwin) |
| SysRes res; |
| res = VG_(do_syscall3)(__NR_write_nocancel, sd, (UWord)msg, count); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| SysRes res; |
| res = VG_(do_syscall4)(__NR_send, sd, (UWord)msg, count, 0 /*flags*/); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown platform" |
| # endif |
| } |
| |
| Int VG_(getsockname) ( Int sd, struct vki_sockaddr *name, Int *namelen) |
| { |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) \ |
| || defined(VGP_mips32_linux) |
| SysRes res; |
| UWord args[3]; |
| args[0] = sd; |
| args[1] = (UWord)name; |
| args[2] = (UWord)namelen; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_GETSOCKNAME, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips64_linux) || defined(VGP_arm64_linux) \ |
| || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall3)( __NR_getsockname, |
| (UWord)sd, (UWord)name, (UWord)namelen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_darwin) |
| SysRes res; |
| res = VG_(do_syscall3)( __NR_getsockname, |
| (UWord)sd, (UWord)name, (UWord)namelen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| SysRes res; |
| res = VG_(do_syscall4)(__NR_getsockname, sd, (UWord)name, (UWord)namelen, |
| VKI_SOV_DEFAULT /*version*/); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown platform" |
| # endif |
| } |
| |
| Int VG_(getpeername) ( Int sd, struct vki_sockaddr *name, Int *namelen) |
| { |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) \ |
| || defined(VGP_mips32_linux) |
| SysRes res; |
| UWord args[3]; |
| args[0] = sd; |
| args[1] = (UWord)name; |
| args[2] = (UWord)namelen; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_GETPEERNAME, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips64_linux) || defined(VGP_arm64_linux) \ |
| || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall3)( __NR_getpeername, |
| (UWord)sd, (UWord)name, (UWord)namelen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_darwin) |
| SysRes res; |
| res = VG_(do_syscall3)( __NR_getpeername, |
| (UWord)sd, (UWord)name, (UWord)namelen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| SysRes res; |
| res = VG_(do_syscall4)(__NR_getpeername, sd, (UWord)name, (UWord)namelen, |
| VKI_SOV_DEFAULT /*version*/); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown platform" |
| # endif |
| } |
| |
| Int VG_(getsockopt) ( Int sd, Int level, Int optname, void *optval, |
| Int *optlen) |
| { |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) |
| SysRes res; |
| UWord args[5]; |
| args[0] = sd; |
| args[1] = level; |
| args[2] = optname; |
| args[3] = (UWord)optval; |
| args[4] = (UWord)optlen; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_GETSOCKOPT, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips32_linux) || defined(VGP_mips64_linux) \ |
| || defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall5)( __NR_getsockopt, |
| (UWord)sd, (UWord)level, (UWord)optname, |
| (UWord)optval, (UWord)optlen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_darwin) |
| SysRes res; |
| res = VG_(do_syscall5)( __NR_getsockopt, |
| (UWord)sd, (UWord)level, (UWord)optname, |
| (UWord)optval, (UWord)optlen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| SysRes res; |
| res = VG_(do_syscall6)(__NR_getsockopt, sd, level, optname, (UWord)optval, |
| (UWord)optlen, VKI_SOV_DEFAULT /*version*/); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown platform" |
| # endif |
| } |
| |
| |
| Int VG_(setsockopt) ( Int sd, Int level, Int optname, void *optval, |
| Int optlen) |
| { |
| # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ |
| || defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) \ |
| || defined(VGP_s390x_linux) |
| SysRes res; |
| UWord args[5]; |
| args[0] = sd; |
| args[1] = level; |
| args[2] = optname; |
| args[3] = (UWord)optval; |
| args[4] = (UWord)optlen; |
| res = VG_(do_syscall2)(__NR_socketcall, VKI_SYS_SETSOCKOPT, (UWord)&args); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGP_amd64_linux) || defined(VGP_arm_linux) \ |
| || defined(VGP_mips32_linux) || defined(VGP_mips64_linux) \ |
| || defined(VGP_arm64_linux) || defined(VGP_tilegx_linux) |
| SysRes res; |
| res = VG_(do_syscall5)( __NR_setsockopt, |
| (UWord)sd, (UWord)level, (UWord)optname, |
| (UWord)optval, (UWord)optlen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_darwin) |
| SysRes res; |
| res = VG_(do_syscall5)( __NR_setsockopt, |
| (UWord)sd, (UWord)level, (UWord)optname, |
| (UWord)optval, (UWord)optlen ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # elif defined(VGO_solaris) |
| SysRes res; |
| res = VG_(do_syscall6)( __NR_setsockopt, |
| (UWord)sd, (UWord)level, (UWord)optname, |
| (UWord)optval, (UWord)optlen, |
| VKI_SOV_DEFAULT /*version*/ ); |
| return sr_isError(res) ? -1 : sr_Res(res); |
| |
| # else |
| # error "Unknown platform" |
| # endif |
| } |
| |
| |
| const HChar *VG_(basename)(const HChar *path) |
| { |
| static HChar *buf = NULL; |
| static SizeT buf_len = 0; |
| const HChar *p, *end; |
| |
| if (path == NULL || |
| 0 == VG_(strcmp)(path, "")) |
| { |
| return "."; |
| } |
| |
| p = path + VG_(strlen)(path); |
| while (p > path && *p == '/') { |
| // skip all trailing '/' |
| p--; |
| } |
| |
| if (p == path && *p == '/') return "/"; // all slashes |
| |
| end = p; |
| |
| while (p > path && *p != '/') { |
| // now skip non '/' |
| p--; |
| } |
| |
| if (*p == '/') p++; |
| |
| SizeT need = end-p+1 + 1; |
| if (need > buf_len) { |
| buf_len = (buf_len == 0) ? 500 : need; |
| buf = VG_(realloc)("basename", buf, buf_len); |
| } |
| VG_(strncpy)(buf, p, end-p+1); |
| buf[end-p+1] = '\0'; |
| |
| return buf; |
| } |
| |
| |
| const HChar *VG_(dirname)(const HChar *path) |
| { |
| static HChar *buf = NULL; |
| static SizeT buf_len = 0; |
| |
| const HChar *p; |
| |
| if (path == NULL || |
| 0 == VG_(strcmp)(path, "") || |
| 0 == VG_(strcmp)(path, "/")) |
| { |
| return "."; |
| } |
| |
| p = path + VG_(strlen)(path); |
| while (p > path && *p == '/') { |
| // skip all trailing '/' |
| p--; |
| } |
| |
| while (p > path && *p != '/') { |
| // now skip non '/' |
| p--; |
| } |
| |
| if (p == path) { |
| if (*p == '/') return "/"; // all slashes |
| else return "."; // no slashes |
| } |
| |
| while (p > path && *p == '/') { |
| // skip '/' again |
| p--; |
| } |
| |
| SizeT need = p-path+1 + 1; |
| if (need > buf_len) { |
| buf_len = (buf_len == 0) ? 500 : need; |
| buf = VG_(realloc)("dirname", buf, buf_len); |
| } |
| VG_(strncpy)(buf, path, p-path+1); |
| buf[p-path+1] = '\0'; |
| |
| return buf; |
| } |
| |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |